Senior Lead Engineer; Fintech and Full Stack

We’re looking for a hands‑on Technical Lead who can both build and guide
—someone comfortable writing production code while also making architectural decisions and helping a small team deliver high‑quality software.

The product spans multiple platforms:

• iOS (Swift)

• Android (Kotlin)

• Web (React)

• Backend (Python + FastAPI, Postgres, AWS)

This is an early engineering leadership role where you’ll help define architecture, set engineering standards, and lead delivery of a secure, performant financial product handling real money internationally
. The problem space includes payments, compliance, integrity, and latency—this is not a simple CRUD application.

You’ll work closely with product, design, and operations, and directly with the founders. As the team grows, this role can expand into broader engineering leadership across platforms—but it starts with hands‑on execution
.

• Leading by example: writing production code across backend and at least one client platform

• Defining system architecture and making pragmatic technical tradeoffs

• Owning delivery of features across mobile, web, and backend systems

• Designing and maintaining systems for payments, ledgering, fraud controls, and AML workflows

• Ensuring the product is secure, reliable, and scalable in real‑world financial environments

• Mentoring engineers through code reviews, design discussions, and hands‑on collaboration

• Working closely with founders to translate product goals into technical execution

• Experience at fintech, payments, banking, crypto, remittances, or lending startups

• Deep, hands‑on experience with Anti‑Fraud, AML, ledgering, and payments orchestration

• 7–10 years building and shipping consumer‑facing mobile and/or web applications

• Meaningful full‑stack exposure (e.g.,
  React/Type Script, Python, Go/Rust, Postgres, AWS, CI/CD
  )

• Proven ability to lead technically
  : making architectural decisions, mentoring engineers, and driving outcomes

• Strong systems thinking with an eye toward performance, security, and correctness

This role is best suited for leaders who still enjoy being close to the code
, especially in fast‑moving startup environments.

• Experience building products for Latin American markets

• Deep background in financial technology or payments

• Strong product intuition and design sensibility across platforms

• Prior experience scaling early‑stage engineering teams

• ✅ A hands‑on technical leadership role
  , not a pure management position

• ✅ Direct ownership over architecture and delivery

• ✅ Startup environment with real product and real constraints

• ❌ Not a high‑level enterprise or megacorp leadership role

• ❌ Not suitable for candidates far removed from day‑to‑day coding

• ❌ Not a single‑discipline role (mobile‑only or backend‑only)

• Location: San Francisco

• Work model: In‑office

• Relocation: Open to relocation (no relocation assistance)

• Visa sponsorship: Available